In a pond oxygen is gathered in two ways. One from the air or from the aquatic plants that live in the pond. Oxygen gets dissolved from these when mixed with air and water movement
B, a nucleus. Nuclei are membrane-bound organelles inside eukaryotic organisms. Eukaryotes are protists, fungi, plants, and animal cells. A bacteria is not a eukaryote, it is a prokaryote, so it does not have the membrane-bound structure of the nucleus.
Be careful, though, bacteria still have DNA. It is simply located in the center of the cell and is not encased in a membrane.
The answer is going to be B .
Answer:
A. Hetrotrophs
Explanation:
Hetrotrophs are plants. They provide energy to the ecosystem as they make food using photosynthesis. And they release oxygen as byproduct of Photosynthesis. And they use Carbon dioxide as raw product for photosynthesis.
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